I just lost my rock

I 15f, was verbally abused (got very close to physical and sexual) from the age of 7-9 by my step father. He eventually hit my brother M too hard and it bruised. Dcyf said (I'm gonna call step father JB because he's never even close to a father figure) JB was not allowed within 500 feet of me or my brother M. My mother stayed with the piece of shit JB. She still says it's for the sake of my youngest brother F. She constantly tried to blame me for everything that happened to JB. She believed JB (S Offender multiple times) over my brother. Multiple years go by, JB goes to prison, gets out early. I can't even stay overnight at her house because OMG JB needs to stay there! And then I discovered something. Competitive swimming. It sounds dumb, but this was the one thing that I could be the best or the worst and I would still loves it. The environment was so very positive and the sport became my passion. Swimming (metaphorically) dragged me out the deep end. I was finally happy. And then everything burned down. Literally the pool building burned down. I live in the middle of nowhere, the closest other pool is 45+ minutes away. But the people on the team can't be replaced. Even if I switched teams, these kids were the only things keeping me from spiraling.